1. John is more careless than Jack, while Jack is more intelligent than John. 2. John is more impractical than Jack, while Jack is more practical than John. 3. John is more polite than Jack, while Jack is ruder than John. 4. John is more easy-going than Jack, while Jack is more ambitious than John. 5. John is more handsome than Jack, while Jack is more unpleasant than John. 6. John is more creative than Jack, while Jack is more boring than John.